simply use #10awg solid copper THHN conductors - inexpensive, so no problem leaving it behind. Cable designer Mike VansEvers advised that it's good enough for him & it's certainly doing me a fine job too. One single circuit runs the whole works.
Breakers are pretty much dictated by the manufacturer of the distribution panel - you have to buy what will fit there.
Breakers are pretty much dictated by the manufacturer of the distribution panel - you have to buy what will fit there.